diff --git a/ExcelExport/ExportTemplate_Main.txt b/ExcelExport/ExportTemplate_Main.txt
index b508b3765..c210e8b01 100644
--- a/ExcelExport/ExportTemplate_Main.txt
+++ b/ExcelExport/ExportTemplate_Main.txt
@@ -14,7 +14,7 @@ namespace ExcelConfig
         
         public override void Init(byte[] data)
         {
-	        Dict = MemoryPackSerializer.Deserialize<Dictionary<int, (ConfigName)>>(data);
+	        Dict = (Dictionary<int, (ConfigName)>)MemoryPackSerializer.Deserialize(typeof(Dictionary<int, (ConfigName)>), data)!;
         }
     }
 
diff --git a/ExcelExport/ExportTemplate_Partial.txt b/ExcelExport/ExportTemplate_Partial.txt
index 72bb33e41..f0d730b6a 100644
--- a/ExcelExport/ExportTemplate_Partial.txt
+++ b/ExcelExport/ExportTemplate_Partial.txt
@@ -23,7 +23,7 @@ namespace ExcelConfig
 		
 		public override byte[] GetData()
         {
-            return MemoryPackSerializer.Serialize(Dict);
+            return MemoryPackSerializer.Serialize(typeof(Dictionary<int, (ConfigName)>), Dict);
         }
     }
 
diff --git a/ExcelExport/GenerateCS/AIConfig.cs b/ExcelExport/GenerateCS/AIConfig.cs
index 8042d8e6a..6239ca057 100644
--- a/ExcelExport/GenerateCS/AIConfig.cs
+++ b/ExcelExport/GenerateCS/AIConfig.cs
@@ -14,7 +14,7 @@ namespace ExcelConfig
         
         public override void Init(byte[] data)
         {
-	        Dict = MemoryPackSerializer.Deserialize<Dictionary<int, AIConfig>>(data);
+	        Dict = (Dictionary<int, AIConfig>)MemoryPackSerializer.Deserialize(typeof(Dictionary<int, AIConfig>), data)!;
         }
     }
 
diff --git a/ExcelExport/GenerateCS/GeoDesc.cs b/ExcelExport/GenerateCS/GeoDesc.cs
index 03c7ef340..0f4e78356 100644
--- a/ExcelExport/GenerateCS/GeoDesc.cs
+++ b/ExcelExport/GenerateCS/GeoDesc.cs
@@ -14,7 +14,7 @@ namespace ExcelConfig
         
         public override void Init(byte[] data)
         {
-	        Dict = MemoryPackSerializer.Deserialize<Dictionary<int, GeoDesc>>(data);
+	        Dict = (Dictionary<int, GeoDesc>)MemoryPackSerializer.Deserialize(typeof(Dictionary<int, GeoDesc>), data)!;
         }
     }
 
diff --git a/ExcelExport/GenerateCS/Moment.cs b/ExcelExport/GenerateCS/Moment.cs
index 0b3176f96..e40156cb2 100644
--- a/ExcelExport/GenerateCS/Moment.cs
+++ b/ExcelExport/GenerateCS/Moment.cs
@@ -14,7 +14,7 @@ namespace ExcelConfig
         
         public override void Init(byte[] data)
         {
-	        Dict = MemoryPackSerializer.Deserialize<Dictionary<int, Moment>>(data);
+	        Dict = (Dictionary<int, Moment>)MemoryPackSerializer.Deserialize(typeof(Dictionary<int, Moment>), data)!;
         }
     }
 
diff --git a/ExcelExport/GenerateCSPartial/AIConfig.cs b/ExcelExport/GenerateCSPartial/AIConfig.cs
index 6c7f82290..ebeb75e78 100644
--- a/ExcelExport/GenerateCSPartial/AIConfig.cs
+++ b/ExcelExport/GenerateCSPartial/AIConfig.cs
@@ -23,7 +23,7 @@ namespace ExcelConfig
 		
 		public override byte[] GetData()
         {
-            return MemoryPackSerializer.Serialize(Dict);
+            return MemoryPackSerializer.Serialize(typeof(Dictionary<int, AIConfig>), Dict);
         }
     }
 
diff --git a/ExcelExport/GenerateCSPartial/GeoDesc.cs b/ExcelExport/GenerateCSPartial/GeoDesc.cs
index 90702e07b..70d25935c 100644
--- a/ExcelExport/GenerateCSPartial/GeoDesc.cs
+++ b/ExcelExport/GenerateCSPartial/GeoDesc.cs
@@ -23,7 +23,7 @@ namespace ExcelConfig
 		
 		public override byte[] GetData()
         {
-            return MemoryPackSerializer.Serialize(Dict);
+            return MemoryPackSerializer.Serialize(typeof(Dictionary<int, GeoDesc>), Dict);
         }
     }
 
diff --git a/ExcelExport/GenerateCSPartial/Moment.cs b/ExcelExport/GenerateCSPartial/Moment.cs
index 054e20be0..c1f8ed036 100644
--- a/ExcelExport/GenerateCSPartial/Moment.cs
+++ b/ExcelExport/GenerateCSPartial/Moment.cs
@@ -23,7 +23,7 @@ namespace ExcelConfig
 		
 		public override byte[] GetData()
         {
-            return MemoryPackSerializer.Serialize(Dict);
+            return MemoryPackSerializer.Serialize(typeof(Dictionary<int, Moment>), Dict);
         }
     }
 
diff --git a/Unity/Assets/Scripts/TH1_Config/GenerateCS/AIConfig.cs b/Unity/Assets/Scripts/TH1_Config/GenerateCS/AIConfig.cs
index 8042d8e6a..6239ca057 100644
--- a/Unity/Assets/Scripts/TH1_Config/GenerateCS/AIConfig.cs
+++ b/Unity/Assets/Scripts/TH1_Config/GenerateCS/AIConfig.cs
@@ -14,7 +14,7 @@ namespace ExcelConfig
         
         public override void Init(byte[] data)
         {
-	        Dict = MemoryPackSerializer.Deserialize<Dictionary<int, AIConfig>>(data);
+	        Dict = (Dictionary<int, AIConfig>)MemoryPackSerializer.Deserialize(typeof(Dictionary<int, AIConfig>), data)!;
         }
     }
 
diff --git a/Unity/Assets/Scripts/TH1_Config/GenerateCS/GeoDesc.cs b/Unity/Assets/Scripts/TH1_Config/GenerateCS/GeoDesc.cs
index 03c7ef340..0f4e78356 100644
--- a/Unity/Assets/Scripts/TH1_Config/GenerateCS/GeoDesc.cs
+++ b/Unity/Assets/Scripts/TH1_Config/GenerateCS/GeoDesc.cs
@@ -14,7 +14,7 @@ namespace ExcelConfig
         
         public override void Init(byte[] data)
         {
-	        Dict = MemoryPackSerializer.Deserialize<Dictionary<int, GeoDesc>>(data);
+	        Dict = (Dictionary<int, GeoDesc>)MemoryPackSerializer.Deserialize(typeof(Dictionary<int, GeoDesc>), data)!;
         }
     }
 
diff --git a/Unity/Assets/Scripts/TH1_Config/GenerateCS/Moment.cs b/Unity/Assets/Scripts/TH1_Config/GenerateCS/Moment.cs
index 0b3176f96..e40156cb2 100644
--- a/Unity/Assets/Scripts/TH1_Config/GenerateCS/Moment.cs
+++ b/Unity/Assets/Scripts/TH1_Config/GenerateCS/Moment.cs
@@ -14,7 +14,7 @@ namespace ExcelConfig
         
         public override void Init(byte[] data)
         {
-	        Dict = MemoryPackSerializer.Deserialize<Dictionary<int, Moment>>(data);
+	        Dict = (Dictionary<int, Moment>)MemoryPackSerializer.Deserialize(typeof(Dictionary<int, Moment>), data)!;
         }
     }
 
diff --git a/Unity/Assets/Scripts/TH1_Logic/Multilingual/MultilingualManager.cs b/Unity/Assets/Scripts/TH1_Logic/Multilingual/MultilingualManager.cs
index 807e2472a..7607b8604 100644
--- a/Unity/Assets/Scripts/TH1_Logic/Multilingual/MultilingualManager.cs
+++ b/Unity/Assets/Scripts/TH1_Logic/Multilingual/MultilingualManager.cs
@@ -28,7 +28,7 @@ namespace Logic.Multilingual
         // 原始翻译快照：仅在游戏启动时拍照一次（apply mod 之前的纯净数据）。
         // 之后所有 mod apply / 重 apply 都基于"先 restore 再 apply"，避免覆盖叠加。
         // key = MultilingualItem.ID, value = 各语种字段的原始值
-        private Dictionary<uint, object> _originalSnapshot;
+        private Dictionary<uint, OriginalLangFields> _originalSnapshot;
 
         // 跟踪 export 数据是否已经被 mod 改写过：用于在切语言时判断是否需要重新 apply
         // （理论上只有 SaveAndApplyMods 会改写，所以这个标志只在那里翻转）
@@ -114,7 +114,7 @@ namespace Logic.Multilingual
             _multilingualData.RefreshDict();
             if (_multilingualData.ItemDict == null) return;
 
-            _originalSnapshot = new Dictionary<uint, object>(_multilingualData.ItemDict.Count);
+            _originalSnapshot = new Dictionary<uint, OriginalLangFields>(_multilingualData.ItemDict.Count);
             foreach (var kv in _multilingualData.ItemDict)
             {
                 _originalSnapshot[kv.Key] = OriginalLangFields.From(kv.Value);
@@ -131,9 +131,7 @@ namespace Logic.Multilingual
             foreach (var kv in _originalSnapshot)
             {
                 if (!_multilingualData.ItemDict.TryGetValue(kv.Key, out var item)) continue;
-                var fields = kv.Value as OriginalLangFields;
-                if (fields == null) continue;
-                fields.RestoreTo(item);
+                kv.Value.RestoreTo(item);
             }
             _modsApplied = false;
         }
@@ -373,7 +371,7 @@ namespace Logic.Multilingual
     /// <summary>
     /// 原始翻译快照行：仅保存 mod 会覆盖的字段（与 WorkshopModLoader.SetItemStr 列表对齐）
     /// </summary>
-    internal sealed class OriginalLangFields
+    internal struct OriginalLangFields
     {
         public string ZH;
         public string TDZH;